This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ACEJ12X50-50B — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ACEJ12X50-50B in place of this model. The ACE replacement is a current-production ISO 21287 compact cylinder in the same bore, stroke and force class, with a matching short body and the same mounting-accessory family, so it fits the same envelope. Confirm mounting-interface dimensions against the ACE datasheet before ordering.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-50B
The AirTAC Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-50B is a double acting, adjustable stroke DIN-standard tight/compact air cylinder with a Ø12mm bore and 50mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ACEJ12X50-50B (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ12 mm
- Stroke50 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM3×0.5
- StatusDiscontinued → ACEJ12X50-50B
About the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-50B
The ACPJ12X50-50B is a double acting compact cylinder with an adjustable stroke, now discontinued and replaced by the ACEJ12X50. Air drives the rod in both directions, and the -50 code gives a 50 mm adjustment window: an external stop screw trims the extend stroke anywhere from 0 to 50 mm on site. At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa those figures rise to 79.2 N and 59.4 N, with a theoretical ceiling of 11.5 kgf at 1.0 MPa.
The short ISO 21287-class body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into slim fixtures and guarding where a full-length body will not fit. The 6 mm rod ends in a MALE thread (the B code) and the air ports are M5x0.8. As a working rule, plan on about 34 N of real work at 0.5 MPa - roughly two thirds of the rating - which lifts about 2.9 kg vertically with a 2:1 margin. Note that the stop sets the end of travel only; on air loss the piston still drifts, so it is not a load lock. Fixed TPU bumpers sit at both ends, speed spans 30-500 mm/s, and the optional -S magnet (not fitted here) is what enables CMSE / DMSE switches.
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-50B Technical Specifications
| Model | Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-50B |
|---|---|
| Series | ACPJ DIN compact cylinder (discontinued) |
| Replacement | ACEJ12X50-50B |
| Bore size | Ø12 mm |
| Stroke | 50 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M3×0.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Fixed bumper (both ends) |
| Max standard stroke | Up to 50 mm |
Specifications follow the official AirTAC ACP datasheet (now discontinued). The ACEJ12X50-50B (ISO 21287) carries the same bore/stroke/force class; confirm mounting-interface dimensions against the ACE datasheet before installation. Rod type: female thread (blank) or male thread (B). Thread options: PT (blank) / G.
Theoretical Output Force (Ø12mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 57 N | 42 N |
| 0.7 MPa | 79 N | 59 N |
| Max (@1.0 MPa) | 12 kgf | |
The ACEJ12X50-50B produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-50B
| ACPJ | DIN compact cylinder (adjustable-stroke, discontinued). |
|---|---|
| 12 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -50 | Adjustable stroke window (mm the extend stroke can be shortened on site). |
| S | Optional built-in magnet for sensor position sensing (omit for no magnet). |
| B | Rod type: B = male thread; blank = female thread. |
Replacement mapping (swap P for E): ACP→ACE, ASP→ASE, ATP→ATE, ACPD→ACED, ACPJ→ACEJ. ACP-family: ACP (double acting), ASP / ATP (single acting push / pull), ACPD (double rod), ACPJ (adjustable stroke).
Where the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-50B Is Used
Micro assembly press
A 34 N working force at 0.5 MPa is enough to seat small connectors or snap-fit caps in electronics assembly, with the stop screw set to a repeatable 20 mm extend stroke.
Slide gate on a compact fixture
The 0-50 mm trim range positions a small gate or shutter exactly, and the short body tucks behind guarding where an ISO 15552 profile cylinder cannot reach.
Lab sample ejector
About 2.9 kg of vertical lift capability with a 2:1 margin suits pushing sample vials or trays off a small benchtop station at 30-500 mm/s.
Replacing the Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-50B with the ACEJ12X50-50B
At 12 mm bore this is the smallest force class in the range: 56.5 N push at 0.5 MPa. Step up to the 16 mm bore for 100.5 N push at the same pressure, or drop to a fixed-stroke ACP if no trimming is needed. The male rod thread suits direct attachment to tooling via I/Y knuckles, and FA/FB flange or LB foot mounts bolt to the standard face. If you need position sensing, order the -S variant - this model has no magnet. For new projects, specify the ACEJ12X50 instead and confirm the ISO 21287 mounting dimensions before swapping, since the ACP series is DIN-standard.
Replacement checklist
- ✓ Current-production ACE → ACEJ12X50-50B
- ✓ Same bore / stroke / force class
- ✓ Confirm ISO 21287 mounting dimensions
- ✓ Port/thread type (PT / G)
- ✓ Add -S for magnet if you need sensors
Airtac ACPJ Adjustable Compact Cylinder ACPJ12X50-50B FAQ
At 0.5 MPa it pushes 56.5 N and pulls 42.4 N; at 0.7 MPa it pushes 79.2 N and pulls 59.4 N; theoretical maximum is 11.5 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, air filtered to 40 um. The port is M5x0.8, the rod is 6 mm with a male thread, and the extend stroke is trimmable by up to 50 mm via the external stop.
No - the ACPJ family is discontinued. The current-production drop-in is the ACEJ12X50 (ISO 21287), which matches the same 12 mm bore, 50 mm stroke and force class. Because the ACP series is DIN-standard, confirm the ISO 21287 mounting dimensions before swapping. The replacement also uses the optional -S magnet code for CMSE / DMSE switches.
Related AirTAC ACE Cylinders
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